[Java] 取得(印出)呼叫外部程式的執行結果

Example: 呼叫 ping 之後，並把執行結果印出

String ip = "127.0.0.1";
String line = "";
Runtime run = Runtime.getRuntime();
Process process = null;
  
try { 
  process = run.exec("ping" + ip);
  BufferedReader br = new BufferedReader(new 
  InputStreamReader(process.getInputStream()));
  
  while ( (line = br.readLine()) != null) {
    System.out.println(line);
  }
  
  br.close();
 
} catch (IOException e) {
  e.printStackTrace();
  run.exit(0);
} 

keyword: java, run, exec, process, runtime